What's up? Hope that computer problem has gotten worked out.
Alright, well, this fakemon's design is decent enough to pass as a Pokémon, but the problems started all the way back with the original art. Most of the glaring mistakes exist in the form of anatomical errors.
Examples include:
- Disproportionate front and hind legs. Its hind legs should be longer than its front - not shorter.
- Not enough of a raise in the rump area.
- Shoulders not like those of any existing quadruped* and a lack of shoulder blades (*and by that, I mean that there should not be a visible curve where the legs connect to its body).
- Feet that are disproportionally large in comparison to its body size (though this may be part of its design).
- A very large chest in comparison to its stomach, almost like it was starved (though again, this may be part of its design).
- Straight, tube-like front legs that lack elbows.
I suppose if you know the shading is a little bad and you now know the lineart needs some work too, the only thing you can do is to keep practicing. In situations where you are unsure about how to shade a surface, try referencing in-game sprites with similar surfaces. Doing so is a good way to conduct your own guided learning. Overall, good first effort (although maybe you show it to your brother and watch him laugh at it for your just-desserts).